/**
 * 参数展开运算符--实参展开
 * */

const arr_argu = [1, 2, 3]
// arr_argu.push(4, 5, 6)

const arr_argu2 = [4, 5, 6]

arr_argu.push(...arr_argu2)
console.log(arr_argu)


const args = [8, 5] as const
const angle = Math.atan2(...args)
console.log(angle)